800(200-x)=640(200+x)

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Solution for 800(200-x)=640(200+x) equation: 



800(200-x)=640(200+x)

We move all terms to the left:

800(200-x)-(640(200+x))=0

We add all the numbers together, and all the variables

800(-1x+200)-(640(x+200))=0

We multiply parentheses

-800x-(640(x+200))+160000=0



We calculate terms in parentheses: -(640(x+200)), so:

640(x+200)

We multiply parentheses

640x+128000

Back to the equation:

-(640x+128000)



We get rid of parentheses

-800x-640x-128000+160000=0

We add all the numbers together, and all the variables

-1440x+32000=0

We move all terms containing x to the left, all other terms to the right

-1440x=-32000

x=-32000/-1440

x=22+2/9

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